Fuel-feeder.



PATENTED MAY 29, 1966.

H. L. DAY.

FUEL FEEDER.

APPLICATION FILED AUG.13,1904.

5 SHEETS-SHEET 2.

.w www@ PATENTED MAY 29, 1906.

H. L. DAY.

FUEL FEEDER.

APPLIOATION FILED AUG.13.1904.-

5 SHEETS-SHEET 3.

lllllllll l IMM wmv PATENTED MAY 29, 1906.

H. L. DAY.

FUEL FEEDER.

APPLIGATION FILED AUG.13.1904.

5 SHEETS-SHEET 4 PATENTED MAY 29, 1906 H. L. DAY.

FUEL FEEDER.

APPLICATION FILED AUG.13,1904.

5 SHEETS-SHEET 5.

. able hopper or fuel-receptacle with a conveyer 'rig t angles to the plane of Fig. 4. 4

fuel into said air-current and means for sepawhich the ollowing 'part-of this spec cation, Fi tion of a furnace-front, s owing my fuel- 'ing means for `roducing a continuous air-cur- 'recting it into a suitable furnace. 'ent invention is an improvement upon the the fuel into the air-current.

.-UNITED .STATES 4PATENT orrron'.

' HENRY L. DAY, or MINNEAPOLIS, MINNESOTA.

FUEL-FEEDER.

Specification of Letters Patent.

Patented May 29, 1906.

Application tiled Augnst13,1904. Serial No. 220,620.

To all whom it may concern:

Be it known that I, ,HENRY L. DAY, of Minneapolis, in the county of Hennepin, State of Minnesota, have invented certain new and useful Im rovements in Fuel-Feeders, of

is a specification.

This invention re ates to improvements in devices designed for feeding finely-divided fuel into any suitable furnace; and the ob- 'jects I have in view are to provide .suitable means whereby the fuel may be evenly and regularly su plied to the mechanism by which it is delivered to the combustion-chamber of the furnace.

The invention consists generally in a suitarrange therein and adapted to move the Vfuel toward a suitable exit-o ening and 'other conveyers operating at su stantially I'ight angles to the first-named conveyer and serving Ato maintain the fuel in condition for be- 'ing operated upon by the first-named conveyer.

' The invention consists, further, in the constructions and combinations hereinafter described, andparticularly pointed out in the claims.

In the accom anying drawings, forming e 1 is an elevafeeder applied thereto. Fig. 2 is a side elevation of the feeder with a section of a portion of the furnace-front, showing the connection 'of the furnace-pipe therewith. Fig. 3 is a lan view of a portion of the feeder. Fig. 4

'1s avertical section of za portion of the fuelhopper and the. conductor leading to the fan. Fi 5 is a transverse section on a plane at In Letters Patent of the United States issued to me A ril 26, 1898, No. 603,076, I have shown an described a fuel-feeder havrent or air-be t with means for directing the rating the fuel from the air-current and di- The presfuel-feeder of my said former patent and relates particularly to the means for directing In the drawings, 2 represents a furnace of any suitable construction, and 3 the stack1 leadin therefrom. Arran ed in connection with t 's furnace is an airelt fuel-feeder of substantially the construction shown in my former patent above referred to and comprising the fan or blower 5, the se arator 6, the pi e or conductor 7, leading om the exit si e of the fan to the inlet of the separator, and the return-pipe 8, leading from the discharge side of the separator to the inlet of the fan. The fuel separated from theair-current by the separator 6 passes through a suitable plpe 9 to the combustion-chamber of the furnace.A These parts are of substantially the construction shown and described in my aforesaid patent. 10 represents a suitable hopper or receptacle, into which the fine material, such as shavin s or fine coal-dust, is placed and from whic it is fed into the pipe or conductor 8, leadin from the fuel-se arator to the fan. This Iiopper may be o any suitable size and construction. t is preferabl provided With one inclined side Wall 1 1, Wit the opposite vertical wall 12 and the vertical end Walls 13. I do not limit myself,

however, to any particular ,shape of hopper.

At the bottom of the hopper I preferably provide a conveyer-trough 14, extending len th- Wise of the hopper and having at one en an opening A15,v Whlch communicates With the interior of the pipe or conveyer 8. This opening is preferab y provided With a slide-valve 16, by means of which the o ening may be wholly or partially closed. ranged in the conveyer-trough 14 and mounted in suitable bearings in the end Walls of the hopper is a spiral or screw conveyer 1-7. This conveyer is adapted to move material along in the convefer-trough tothe opening 15, through which 1t alls into theconductor 8, in which it is taken up by the air-current passing-through said conductor to the fan. Arranged at one side of the conveyer-trough and mounted in suit-` able bearings are the upright conveyers 18.

These conveyers are referably arranged in' material from arching or bridging over from one Wall of the hopper to the other. l

I have found that in feeding shavings or like material from the hopper by means of a screw conveyer or similar device there is a tendency for the material to arch or bridge over the conveyer. This will stopl the feed of the material. To prevent this, I use the beams 23, forming al supporting-frame forthe hopper and the feed mechanism.

I prefer to provide means by which the fan, the longitudinal conveyer, and the upright conveyers may all be driven from a single driving-shaft. As herein shown, 24 represents a suitable driving-shaft mounted in bearings 25 upon the cross-beams 23 of the framework. This shaft is provided with a pulley 26, and the fan-shaft 27 is provided with a pulley 28. A belt 29 extends from the pulley 26 to the pulley 28, and by th1s means the fan is continuously driven. This fan` as before stated, creates a circulation of air or an air-belt, as it may be termed, from the fan-casing through the conductor 7, through the fuel-separator 6, and through the conductor 8 back to the fan. Thedriving-shaft 24 is also provided with a pulley 30, and a counter-shaft 31 is provided with a ulley. 32. A belt 33 extends from the pulliay 30 upon the shaft 24 around the pulley 32, and by this means the counter-shaft 31 is also driven. This shaft is provided with the pulregulate t -into the conductor 8. For this pur ose the -ley 34. A short shaft 35, mounted in bearings 36 upon the beams 23 ofthe framework, is provided with a pinion 37, that meshes'with a pinion 38 upon the shaft 21. The shaft 35 is provided with a pulley 39,and a belt 40 extends from the pulley 34 around the pulley 39. By this means the shaft 21 is driven and the upright conveyers 18 are all rotated.

It 1sv desirable to provide means to rotate the conveyer 17 at any desired speed so as to e-feed of the fuel from the hopper shaft of the conveyer is provided wit a ear 41, anda pinion 42, mounted upon a s aft 43, meshes with the gear 41. The shaft 43 is provided with a cone-pulley 44 and a similar cone-pulley 45 is arranged-u on the shaft 31. A belt 46 passes around t ese two pulleys and may be shifted lengthwise thereofby hand or by any suitable means. By this f means the conveyer 17 is driven, and the speed thereof may be regulated so as to regulate the feed ofthe material into the conductor 8. I do not limit myself to the details of .the construction, as the same may be varied 1n many particulars without departing from y my invention, nor do I limit myself to any a suitable hopper provided with a discharge- The -said hopper to sai vin said opper and operating to move a portion of the material away from said dischargeopening. v

2. T e combmatlon, 1n a fuel-feeder with a suitable hopper provided with a dischargeopening, of a conveyer arranged in said ho per and adapted to move material to said discharge-openin and a series of conveyers arranged in said opper and extendin at an angle to said first-named conveyer an operating to move the material affected thereby away from said discharge-opening in the hopper in a loose condition.

3. The combination, in a fuel-feeder, with a suitable hopper provided with a dischargeopening, of a conveyer arranged in said ho per and adapted to move material to said discharge-opening, and a series of conveyers arranged in said hopper .and extending uplward therein and operating to move the material affected thereby away from said 'discharge-openin 4. The com ination, in a fuel-feeder with a suitable hopper provided with a dischargeopening, of a conveyer arranged in said hopper and adapted to move material to said discharge-openin and a series of conveyers arranged in said opper and extending substantially at a right angle to said first-named conveyer and operating to move the material `affected thereby away from said discharge-openin `5. The com ination, in a fuel-feeder, with a' suitable hopper provided with a dischargeopenin of a conveyer arranged in said hopper an serving to move material to said discharge-opening, 'a conveyer arranged in said hopper and extending upward therein, and means for rotating said last-named conveyer 'so as to move the material upward in the hopper and prevent it from brid ing above said' hopper-opening, substantially as described. 6. The combination, in a fuel-feeder'with a suitable hopper provided with a dischargeopening, of a conveyer arranged in said hopper and adapted to move material to said discharge-opening, and a series of conveyers arranged in said hopper and extending upward therein, and means for rotating said last-named conveyers so as to move material upward in said hopperwhereby the material IOO IIO

in the hopper may be maintained ina loose condition and prevented from bridging between the walls of said hopper.

7. The combination, in a fuel-feeder, with a hopper having a discharge-opening, of a conveyer operating to move the material in Adischarge-opening, and a conve er operating to prevent the material from ridgmg above said first-named conveyer, for the purpose specified.

8. The combination, in a fuel-feeder, With a hopper having a discharge-opening, of a conveyor operating to move the material to said opening, and a series of conveyers arranged substantially `parallel With one another and' operating c ose to a side Wall of said hop er to prevent the material from bridging etween the hopper-Walls, substantially as described.

9. The combination, in a fuel-feeder, with a hopper having a discharge-opening, of a conveyer operatmg to move the material to saidvdischarge-opening, and a Series of oonveyers operating close to a side Wall of sald hopper to move the material aected there- 15 by upward and prevent the formation of bridges between the hopper-Walls, substantially as described.

In Witness whereof I have hereunto set my hand this 10th day of August, 1904.

. HENRY L. DAY. In presence of- A. C. PAUL, C. G. HANsoN. 

